<script setup lang="ts">
import { reactive, ref } from 'vue';

import { onLoad } from '@dcloudio/uni-app';
import { SubTypeItem, getRecommend } from '@/api/home';

interface metaType {
  title: string;
  coverPath: string;
  tabs: string[];
}

const metaMap = reactive<{ [key: string]: metaType }>({
  1: {
    title: '特惠推荐',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_1.jpg',
    tabs: ['价格', '折扣', '筛选'],
  },
  2: {
    title: '爆款推荐',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_2.jpg',
    tabs: ['24小时热搜', '热销总榜', '人气周榜'],
  },
  3: {
    title: '一站买全',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_3.jpg',
    tabs: ['搞定熊孩子', '家里不凌乱', '让音质更出众'],
  },
  5: {
    title: '新鲜好物',
    coverPath:
      'https://pcapi-xiaotuxian-front-devtest.itheima.net/miniapp/uploads/recommend_4.jpg',
    tabs: ['抢先尝新', '新品预告'],
  },
});

let type = $ref('1');
let meta = $ref(metaMap[type]);

onLoad(({ type }) => {
  if (type) meta = metaMap[type];
});

// 动态更新导航栏标题
// uni.setNavigationBarTitle({
//   title: meta.title,
// });
// ===================================================================>>>>>>>>>>>>>
// 特惠推荐
const imgUrl = ref('');
const subTypes = ref<SubTypeItem[]>([]);
const activeIndex = ref(0);
// type 和 url 的映射关系
const urlMap = [
  { type: '1', title: '特惠推荐', url: '/hot/preference' },
  { type: '2', title: '爆款推荐', url: '/hot/inVogue' },
  { type: '3', title: '一站买全', url: '/hot/oneStop' },
  { type: '4', title: '领券中心', url: '/hot/new' }, // 后端未提供，暂用新鲜好物url
  { type: '5', title: '新鲜好物', url: '/hot/new' },
];
// 当前浏览类型的请求的地址
let subTypesUrl: string;

onLoad(async ({ type }) => {
  const currenturlMap = urlMap.find((item) => item.type === type);
  if (currenturlMap) {
    const res = await getRecommend(currenturlMap.url, {});
    imgUrl.value = res.bannerPicture;
    uni.setNavigationBarTitle({
      title: res.title,
    });
    subTypes.value = res.subTypes;
    subTypesUrl = currenturlMap.url;
  }
});

// 触底
const onScrolltoloser = async () => {
  // 拿到当前活动的tab类型
  const currentSubType = subTypes.value[activeIndex.value];
  // 当前页自增
  currentSubType.goodsItems.page++;
  // 判断当前页是否大于总页数
  if (currentSubType.goodsItems.page > currentSubType.goodsItems.pages) return;

  // 请求获取数据接口(传参)
  const res = await getRecommend(subTypesUrl, {
    // 当前页
    page: currentSubType.goodsItems.page,
    // 一页多少个
    pageSize: 10,
    // 当前浏览的tab类型
    subType: currentSubType.id,
  });
  // 在当前浏览页的数据后累加数据
  currentSubType.goodsItems.items.push(
    ...res.subTypes[activeIndex.value].goodsItems.items
  );
};
</script>

<template>
  <view class="viewport">
    <!-- 推荐封面图 -->
    <view class="cover">
      <image :src="imgUrl"></image>
    </view>
    <view class="tabs">
      <text
        class="text"
        v-for="(item, index) in subTypes"
        :key="item.id"
        :class="{ active: index === activeIndex }"
        @tap="activeIndex = index"
        >{{ item.title }}</text
      >
    </view>
    <scroll-view
      v-for="(item, index) in subTypes"
      :key="item.id"
      v-show="index === activeIndex"
      scroll-y
      enhanced
      :show-scrollbar="false"
      class="scroll-view"
      @scrolltolower="onScrolltoloser"
    >
      <view class="goods">
        <navigator
          v-for="goods in item.goodsItems.items"
          :key="goods.id"
          hover-class="none"
          url="/pages/goods/index"
          class="navigator"
        >
          <image class="thumb" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
            <text class="decimal">.00</text>
          </view>
        </navigator>
      </view>
      <view class="loading">{{
        item.goodsItems.page > item.goodsItems.pages
          ? '没有更多了'
          : '加载中...'
      }}</view>
    </scroll-view>
  </view>
</template>

<style>
page {
  height: 100%;
  background-color: #f4f4f4;
}

.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}

.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;

  position: absolute;
  left: 0;
  top: 0;
}

.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
}

.tabs .text {
  margin: 0 20rpx;
  position: relative;
}

.tabs .active::after {
  content: '';
  width: 40rpx;
  height: 4rpx;
  transform: translate(-50%);
  background-color: #27ba9b;
  position: absolute;
  left: 50%;
  bottom: 24rpx;
}

.scroll-view {
  flex: 1;
}

.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
}

.goods .navigator {
  width: 345rpx;
  padding: 20rpx;
  margin-top: 20rpx;
  border-radius: 10rpx;
  background-color: #fff;
}

.goods .thumb {
  width: 305rpx;
  height: 305rpx;
}

.goods .name {
  height: 88rpx;
  font-size: 26rpx;
}

.goods .price {
  line-height: 1;
  color: #cf4444;
  font-size: 30rpx;
}

.goods .symbol,
.goods .decimal {
  font-size: 70%;
}
</style>
